| 主权项 |
1. An arrangement of segmented retractablerotor seal in a stator of a turbine, by which the rotor seal is arranged radially and axially movably in a groove formed in the stator of the turbine and is connected with a means which retracts it away from the rotor of the turbine in radial direction, wherein the groove formed in the stator of the turbine contains an outer partial groove formed on the inner surface of the stator and an inner partial groove connected with it and formed in the body of the stator, the width of the groove being smaller than or equal to that of the outer partial groove, whereby the rotor seal contains a head of the seal, which is arranged in the inner partial groove, and a comb of the seal, which is arranged in the outer partial groove, wherein the head of the seal and the comb of the seal are connected by a neck of the seal, and the smallest clearance (V) along the entire height of the arrangement of the rotor seal is formed in the direction of movement of sealed medium between the downstream face of the comb of the rotor seal and the wall of the outer partial groove facing it, whereby the space in the direction of the movement of sealed medium before the rotor seal and the space closed between the upper surface of the comb of the seal and the stator of the turbine on the opposite side of the rotor seal are connected by at least one connecting hole created in the neck of the seal and/or at least one hole/slit created in the stator of the turbine on each side of the inner partial groove and connected with it. |
